powershell delete vss snapshots via wmi

delete-old-snaps.ps1

# source: https://github.com/MSAdministrator/PoshCodeMarkDown/blob/master/docs/Delete-Old-Shadow-Copies.ps1.md
# modified...


# TODO: only handle c:
# TODO: Never delete the last snapshot, or even better the last two?

Get-WmiObject Win32_Shadowcopy | ForEach-Object {
    .InstallDate $strShadowID = $.ID $dtmSnapShotDate = [management.managementDateTimeConverter]::ToDateTime($WmiSnapShotDate) $strClientAccessible = $_.ClientAccessible $dtmCurDate = Get-Date
    $dtmTimeSpan = New-TimeSpan $dtmSnapShotDate $dtmCurDate $intNumberDays = $dtmTimeSpan.Days
    If ($intNumberDays -ge 7 -and $strClientAccessible -eq "True") {
        $_.Delete() }
}

https://serverfault.com/a/527384/106483 looks better, especially

$shadowCopies[0].Delete() - Deletes the first shadow copy when more than one exists